#include<stdio.h>

#define MAX 1000
#define CASE break;case
int main()
{
    int arr[MAX] = {0};
    int n = 0;
    scanf("%d", &n);
    switch(n)
    {
        case 1:
            //...
        CASE 2:
            //.....
        CASE 3:
            //.....
            break;
    }
    return 0;
}


